[That earns the lightest of snorts from England but really, they've said worse. This is polite and pleasant banter and presently there are bigger fish to fry.]

... Really. [turning this over in his mind...] So we're mortal but without the permanently dying part. That's comforting. [note his sarcasm.]

But. Er... yeah... Will keep that in mind. [translation: thanks for letting him know.]